I remember a couple of Call of Cthulu on PC and Xbox 360 had me completely stumped, having to look online for the answer (which I rarely do)and I knew I could have been there for days without working it out

Outside of that Braid's made me feel like a genius once I worked them out

Castlevania 2. How did anyone ever know that they had to kneel down (by holding down for like 5 seconds) in front of a cliff wall with a certain item (a red crystal) equipped so that a tornado would show up and carry you away to where you were supposed to go.

A puzzle so hard that I would imagine they had to just release the answer via Nintendo Power or whatever just so people would know what to do next.

I've remember that one. 2 my friends and I got, after 2hrs, 3head thats' total 6hrs haha. His parents yelled at us for skipping dinner for a video game. We use up all our warns too, So, we started having dinner at my house. hehe. -_-;;

The hardest puzzle, I say any jpn RPG, NPC don't say anything, and they need this item. And 70% of the time, you didn't pick it up from point A, now you're at point N, and can't return to point A at all. 30% of the time is that you sold the item for gill, coin, gold. It's usually poor game programming, the game can't move forward. -_-;; Games now wont let sell quest item, >.< Lastly its not even a puzzle. -_-;;

I can't think of the most difficult puzzle I've solved without any help, but certainly adventure games can have some pretty gnarly ones because they can be so obtuse. The Monkey Island games have some pretty good examples of these - love those games though.

I will say a fantastic example of good, thoughtful puzzles are the ones in 999 and Virtue's Last Reward. They are the essence of old school adventure game puzzles distilled into more focused, logical situations.

I haven't played Phoenix Wright or Professor Layton, but I have a feeling I'd really enjoy those games. I guess whenever I get a 3DS I'll splurge.

I suggest to those who love RPGs & puzzles to try Alundra a game like no other I have play, I had a blast playing this game back in PS1 days it was an amazing experience but also very hard at times, some of the puzzles u must solve in order to move forward on this game will make your head explode & break your @@ :P but I guarantee that it's worth it :)